Floor grate



FIG. 1 is a perspective view of a floor grate, showing my new design;

FIG. 2 is a fragmentary top plan view thereof;

FIG. 3 is a fragmentary side elevational view thereof;

FIG. 4 is a fragmentary front elevational view thereof; and,

FIG. 5 is a fragmentary bottom plan view thereof.

The broken line showing of the tubular support structure is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a floor grate, as shown and described. 